@amoun not sure why the validator throws type="text/css" and type="text/javascript" as warnings. Even when they are not necessary by definition, due to those are the default values for the <style> and <script> tags, they are still valid MIME Types, which is, according to the standard, the first condition to meet when the optional type parameter is present in the tag (https://www.w3.org/TR/html5/document-metadata.html#the-style-element).

I think we shouldn't take note of these warnings, knowing that they are not listed as HTML markup issues.